Attachment for drilling, boring, and similar machines.



F. A. KIRBY.

ATTACHMENT FOE DRILLING, BORING, AND SIMILAR MACHINES. APPLIOATION IILED JUNE 7, 1909.

Patented Oct. 4, 1910.

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FRANK A. KIRBY, OF DETROIT, EJIIQl-IIGAN.

ATTACHMENT FOB. DRILLINQJBORING, AND SIMILAR MACHINES.-

To all whom it may concern:

Be it known that l, FRANK A. KIRBY, a citizen of the United States, residin at Detroit, in the county of Wayne and gtate of Michigan, have invented certain new and useful Improvements in Attachments for Drilling, Boring, and Similar Machines, of which the following is a specification.

This invention relates to an attachment for drilling, boring, and similar machines having a vertically reciprocable spindle or other movable member carrying the cutting tool and its object-is to provide a simple and inexpensive device which may be readily attached to any ordinary machine of this character to limit the longitudinal movement of the spindle or other vertically reciprocable tool carrying member and which may be quickly adjusted to bring any one of a series of positive stops into operative position to accurately determine the depth to which the cutting tool shall go.

To this end the invention consists in providing a carrier for a series of stop members which carrier may be moved to quickly bring any one of the stops into position to engage and positively and accurately determine the length of movement of the tool carrying member, and in providing the device with certain new and useful features all as here inafter more fully described reference being had to the accompanying drawings in which,

Figure 1 is a perspective View of a portion ofan tip-right drill showing the attachment embodying the invention in place thereon; Fig. 2 is aperspective view of the attachment drawn to a larger scale; Fig. '3 isa side elevation of the same; Fig. 1, a plan view; Fig.5 a similar view of the collar; Fig. 6 is an enlarged sectional detail of one of the ad justable stop. pins; and Fig. 7 is a cross section of the carrier showing the same upon a supporting bracket adapted to be secured directly to the machine head or frame.

As shown in Fig. 1, 1 is the base of an ordinary upright drillingmachine from which rises the column 2 supporting a bracket carery-ing a suitable table 3, and upon which column a vertically movable head 4 is supported. 5 is a rotatable spindle to the lower end of which-the cutting tool is attached and 6 is a sleeve vertically movablein the head and through which the spindle 5 extends."

A rack 7 is provided upon the rear side of the sleeve 6-which rack is adapted to be engaged by a pinion upon a shaft 8 in the head.

I Specification of Letters Patent.

Application filed June 7, 19GB.

Patented @ct. a, rare.

Serial No. 500,585.

imparted to the sleeve 6 to move the same vertically through the head to automatically feed the spindle with its cutting tool downward. The shaft 11 is pivoted at its rear end so that it may fall at its forward end and disengage the worm 10 from the gear 9 and thus stop the transmitting of motion to the sleeve, and the downward feeding of the tool. A handle 14 is pivoted intermediate its ends to the head and a suitable connection 15 attached to its rear end connects the same with the forward end of the shaft 11 so that said shaft may be raised and held by the handle with its worm 10 in engagement with the pinion 9. All of the foregoing described parts are constructed and arranged to operate in an old and well-known manner, the drilling machine embodying said parts forming no part of this invention.

Pivotally attached to the forward side of the head 4 is a latch 16 havin a bill or notch to engage the upper, side 0 the handle 14 and hold the handle with the shaft 11 raised and the worm 10 engaged with its pinion to transmitmotion to the sleeve 6 and feed the cuttin tool to the work. This latch 16 is forme with a handle 17 by means of which it may be operated to disengage it from the handle 14 and upon the handlel'? is. a bracket 18 to which is pivotally attached at its axis a circular carrier 19. This carrier may be a disk or it ma be, as shown, a ring provided with a spi er and axial hub through which its pivot pin for attaching it to the bracket, extends. In the 11 per side of the carrier is a series of spaced openings 20'toreceive a series of stop pins 21 of difi'erent lengths. Each of the pins 21 is formed with a reduced lower end to en age the openings 20, said reduced portion orming a shoulder 22 on each pin to ,engage the upperisurface of the carrier or bracket 18 may, if desired, be extended, as shown, across the carrier, and provided with a pointer 25 so that when one of the indicating numbers 26 is brought in line with the pointer by turning the carrier, it will indicate that the pin represented by said number is in operative position,

A collar 27 is made in two parts pivotally connected at 28 and detachably secured together at the other side by a screw 29. This collar is clamped' to the sleeve 6 by the drawing together of its parts by the screw 2.9, and said collar is prevented from Shiiting upon the sleeve by being provided with a rib 30 atits inner side to engage between the teeth of the reel; 7 upon the sleeve 6. The collar is provided at its forward side with a downwardlyprojecting lug 31 which, when the sleeve is lowered, will come into contact with one of the pins 21 when the same is in operative position The carrier 19 may be turned however, so that the lug will pass between two of the pins and thus moved downward to the limit of its stroke or until the lug engages the carrier and actuates the latch to disen age the same from. the handle 14 and stop toe motion.

In Fig. 7 the carrier is shown ivotally attached to a bracket 32- which is a opted to be rigidly secured to the head 4' of the drill, This rigidly attached bracket is need upon a drill which is provided with ahand feed and when the sleeve 6 is fed down by the ordinary hand mechanism, the projection on the collar secured to the sleeve will engage one of, the pins turned into alinement there with and stop the feeding of the spindle.

In modern machine shop practice very accurate work is required and often a me chanic is given a job requiring the boring in.

succession of a number of holes of diiierent to set the machine for each hole and this takes a great deal of time especially where very accurate work is required, and the op erator is liable to make mistakes, By pro viding the machine with the attachment dc? scribed, the operator will place in thecarrier, pins of such a length that the latch will be operated and the feeding stopped when the tool has reached exactly the proper depth each pin corresponding to the depth of hole required, These pins form positive stops which will determine the depth of hole each time without a variation, and being carried upon the rotatable table or carrier 19 any one of them may be quickly brought into operative position, For extreme ac curacy the adjusting screw 23 is provided in each pin, :this screw being adjusted to compensate for wear of the cutting tool etc, and to accnratcl determine the length of the pin. The on lcr WE may be quickly ad. justed upon the sleeve to adjust the stroke evnevo of said sleeve and when so adjusted. it is rigidly held against movement thereon by being firmly clamped thereto, and also by the engagement of its 30 with the rack 7.

While I have illustrated this invention as applied to an upright drill, I do not wish to limit myself to such application as it is apparent that the attachment may be nsed upon other types of mach nes and machines for other purposes, and I do not wish to confine myself to the specific construction as is. obvious that various changes within the scope of, the appended claims may be made in. the construction to suit the machinetowhich it is applied without depart- :troin' the spirit of the invention Having thns fully described my invention what l claim is:

I. The combination in. a machine having a vertically movable spindle, means for moving the spindle and means edapted when operated to throw the moving in ans out of of a stop on the throwcut means and a collaradinstably and detachably secured around the spindle and adapted to cocci; with the stop to operate the throw-out means when the spindle reaches a predetermined point,

2. The combination in a machine having a vertically movable spindle, means for moving the spindle and means adapted when operated to throw the moving out of gear, of a on the throw-out means and a collar spindle having two compleniental pivotally-connected at one end means detachably securing the other ends, the collar being adapted to coact with the stop to operate the throw-out means when the reaches a predetermined point,

3. The combination is. a machine having a vertically movable spindle, a reel: on the spindle, means for moving the spindle and means adapted when operated to throw the moving means out of gear, of a stop on the throw-out means and a collar adjustably and cletachabl secured aroiind the spindle in interlocked relation with the rack and adapted to co-act with the stop to operate the throw-out means when the spindle reaches a predetermined point.

4. The combination in a machine having a vertically movable spindle, a reel; on the spindle, means engaging the rack for movmg the spindle and" means adapted when operated, to throw the moving means, out of gear, of a stop on the throw-out means, a' collar adjustably and detachably-secured around the spindle, and rib on the collar detachably interlocking with the rack, the collar being adapted tone-act with the stop to operate the throw-out means when the spindle reaches a predetermined point,

5. The combination with a machine having a vertically movable spindle, a rack on the spindle, means engaging the rack for moving the spindle, and means adapted when operated to throw the moving means out of gear, of a stop on the throw-out means, a collar adjust-ably and detachably secured around the spindle in engagement with the said rack, and a lug 0n the collar adapted to coact with the stop to operate the throw-out means when the spindle reaches a predetermined point.

6. The combination with a machine having a vertically movable spindle, means for moving said spindle, and means adapted when operated to throw the moving means out of gear, of a Vertically adjustable stop 0n the throw-out means, a collar on the spindle adjustable longitudinally thereof, and a lug on the collar adapted to coact with the stop to operate the throw-out means when the spindle reaches a predetermined point, 20

FRANK A. KIRBY.

Witnesses:

A. HoLs'r, l ANNY llownns. 

